000 00398nam a2200145Ia 4500
008 230524s9999 xx 000 0 und d
040 _cUDSM
050 _aQC661.A4293
100 _aAl'pert, I. L.
_eAuthor
245 0 _aRadio wave propagation and the ionosphere
260 _aNew York :
_bConsultants Bureau,
_c1963.
300 _ax,394p. :
_bill. ;
_c28cm.
942 _2lcc
_cBK
942 _cBK
_2lcc
999 _c57996
_d57996